Scanning electron microscopy with energy dispersive X-ray spectrophotometry analysis of reciprocating and continuous rotary nickel-titanium instruments following root canal retreatment

Kalyoncuoğlu, Elif; Keskin, Cangül; Uzun, İsmail; Bengü, Aydın Şükrü

doi:10.2334/josnusd.15-0725

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…Despite Kalyoncuoğlu et al (25) reporting alterations in NiTi content of instruments before and after use, this change was not significant. On the other hand, the results of the present study demonstrated a significant decrease of Ni content (p<0.05) on instruments surface, irrespective of the tested system, before and after the first and third use.…”

Section: Discussionmentioning

confidence: 46%

Topographic and Chemical Analysis of Reciprocating and Rotary Instruments Surface after Continuous Use

et al. 2017

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This study aimed at evaluating the changes in surface characteristics and NiTi content of reciprocating and rotary instruments after continuous use. Thirty brand-new instruments were assigned to 3 groups (n=10): PNX1 Group -ProTaper Next system -instrument X1; PNX2 Group -ProTaper Next system -instrument X2 and WO Group -WaveOne system -Primary instrument 25.08. The instruments were used to prepare 60 simulated root canals. Analysis of surface characteristics by scanning electron microscopy (SEM) and chemical analysis of Ni and Ti content by energy-dispersive spectroscopy (EDS) were performed before and after the first and third use of the instruments. Only WO Group had significant increase in the quantity of defects and deformations after the third use (p<0.05). PNX1 Group had significant decrease in Ni content after the third use, in comparison with the unused instruments (p<0.05). PNX1 Group had no decrease in Ti content throughout the time of use (p>0.05), however, in PNX2 Group, there was significant decrease in the different time interval of analysis (p<0.05). Continuous use promoted increase in defects and deformations only for WaveOne instruments. Chemical composition presented significant changes according to the time of instruments use.

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Section: Discussionmentioning

confidence: 46%

Topographic and Chemical Analysis of Reciprocating and Rotary Instruments Surface after Continuous Use

et al. 2017

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“…Ni:Ti content changes have been observed after usage of rotary instruments compare to the situation before their use [18]. On the other hand authors did not report presence of any other elements over working surface of endodontic file [18], meanwhile in our study it was found that such even in places with no visible signs of impurities contains carbon, oxygen and minor traces of other elements. Hypothetically amount of such may change during the use, even if correspondence between nickel and titanium remains the same.…”

Section: Kalyoncuoğlu Et Al Demonstrated That No Significantcontrasting

confidence: 51%

Local Elements Content on Working Surfaces of Five Different New Ni-Ti Rotary Endodontic Files: SEM-EDS Study

Noenko,

Fedak,

Biley

2024

J. Dentists

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Objective: To assess diversity of local elements content within working surfaces of five different new Ni-Ti rotary endodontic files. Methods: Energy dispersive spectrometry (EDS) for local elements content analysis was held within three specific areas of working surfaces of the files identified over received SEM images: 1) with pronounced visible signs of impurities; 2) with slightly visible signs of impurities; 3) with no visible signs of impurities. EDS procedure was provided with the use of EDS-detector. Local elements content data at the three above-mentioned specific areas of files’ working surfaces was presented in means of weight percent (wt%), normalized to 100%, and was automatically calculated by the SEM-EDS software. Results: Expressiveness of visible signs of impurities present over working surfaces of the files demonstrated correlation with nickel (r=-0.62, p < 0.05) and titanium (r=-0.49, p < 0.05) content at analyzed areas, while also with carbon (r=0.57, p < 0.05) and oxygen (r=0.50, p < 0.05) content at analyzed areas. Odds ratio for possibility to register traces of one of the following elements N, Na, Mg, Al, Si, S, Cl, Cr, Fe, Ca at the working surface of endodontic file under condition of present pronounced visible signs of impurities was found to be at the level of OR=12.5 (95% CI: 1.08; 143.44; p=0.04). Conclusions: None of the analyzed files was free of impurities over their working surface. Carbon, oxygen, nickel, and titanium were the most prevalent elements observed along working surfaces of five new different endodontic files, while some instruments were characterized with the presence of tungsten, silicon, aurum, iron, chromium, magnesium and nitrogen, maximum level of which at selected areas with pronounced visible signs of impurities outreach 10% weight percent values.

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“…1,2 Aspects such as motorized operation and procedural times have improved due to the SE properties of NiTi. 3 However, the relationship between cutting efficiency, heat treatment, rotary motion, cross-section, and tapper design, is complex and needs to be studied and more thoroughly understood. 4 Even though NiTi files have shown outstanding properties superior to stainless steel and other materials, there are still some issues that need to be solved to improve NiTi file reliability in endodontic practice.…”

Section: Introductionmentioning

confidence: 99%

Factors influencing NiTi endodontic file separation: A thematic review

Orozco-Ocampo,

Escobar-Rincón,

Jiménez-García

et al. 2024

Dent. Med. Probl.

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Nickel-titanium (NiTi) file separation during endodontic treatment is an undesirable event. This phenomenon needs to be understood by knowing the factors influencing fracture in endodontic files. There is a large amount of literature where these factors and their influence have been studied, increasing the knowledge about the mechanisms involved, mainly related to wire technology, file shapes and geometry, operator manipulation, the anatomy of the root canal, and the irrigation and sterilization processes. As many factors are involved, the complexity of the fracture phenomena increases and the isolated correlation of one factor with the file fracture becomes a small part of comprehending the separation phenomena. This thematic review aims to compile important reports from 2014 to 2022 on the factors influencing NiTi file separation. The information obtained was classified into wire technology, file geometry, operational aspects, irrigation and sterilization, and anatomy. For this purpose, the Scopus, Web of Science and ScienceDirect databases were consulted using a search string. Filters were applied to consolidate the final set of relevant papers covering the subject of factors influencing endodontic file separation. It was found that the fracture of NiTi files incorporates different mechanisms that operate simultaneously during the endodontic procedure and strongly affect the instrument performance. The collected information promotes good practices to prevent file separation.

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Scanning electron microscopy with energy dispersive X-ray spectrophotometry analysis of reciprocating and continuous rotary nickel-titanium instruments following root canal retreatment

Cited by 5 publications

References 22 publications

Topographic and Chemical Analysis of Reciprocating and Rotary Instruments Surface after Continuous Use

Topographic and Chemical Analysis of Reciprocating and Rotary Instruments Surface after Continuous Use

Local Elements Content on Working Surfaces of Five Different New Ni-Ti Rotary Endodontic Files: SEM-EDS Study

Factors influencing NiTi endodontic file separation: A thematic review

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